Mixing valve



R. YUZA MIXING VALVE Jan. 25, 1949.

Filed June 11, 1945 WMU@ Nr XL Ma/MMM w 4 w l 5 w Patented Jan. 25, 1949 Rudolph Yuza., chicago, 1u., assignor to A. Daikin Company, Chicago, Ill., al corporation of 'illinois Application .tu-ne. 1i, 1945, serial No. 598,836

` (ci. Ven -26) l'Ciaiins. l

This invention relates to certainnew and useful improvements in mixing valves. More particu.- larly the invention relates to a valve for dispensing a mixed beverage.

In this aspect. of the invention, one of. the principal objects is to provide a valve of this character which will be highly eflicient in use and economical in manufacture..

Generally speaking, where valves ofthe character hereinafter described are employed for mixing beverages, in such mixture there is employed a. syrup of the desired flavor. This syrup is generally admitted. or drawn into a measuring chamber and thence -iorced under pressure intoa mix ing chamber, or in some. instances the syrup is forced, after being drawn into the valve,` into the container in which the beverage. is to be served. Whichever way the syrup is admitted into the valve, it is apparent that the syrup,` being of a viscous nature, has a tendency Vto coagulateon the operative parts or the moving parts of the valve structure, resulting in. an inefficient operation of the mixing valve. Furthermore, sealing a valve ofv this character'so as to prevent leakage thereof has always beenfa problem with. those concerned with this art.. In addition to: this, it has been the aim to produce a mixing valve which will consist of the minimum number of parts.

To overcome these several known objections, it is an object to provide a mixing Valve in the chambers of which there is` always maintained a quantity of water and upon operation of the valve the chambers will be flushed so as to remove any surplus syrup therefrom, and as the chambers are always maintained with a quantity of water, it is clear that by capillary action leakage of the valve` is prevented.

Other objects will appear hereinafter.

rlhe invention consists in the novel combination. and arrangement of parts. to be hereinafter claimed and described;

The invention will be best understood by reference to the accompanying drawings showing the preferred form of construction, andV in which.:

Fig. l is an elevational view of the invention showing the valve mounted upon a supporting wall; r

Fig. 2 is a vertical sectional detail view of the same; n

Fig. 3 is a vertical sectional detaiiview' similar to that shown in Fig. 1 butshowing the parts in different relation with respect to each other.

Thev drawings illustrate the preferred form of construction by which the several objects of my invention are accomplished.

in this connection, my' improved mixing valve `2; my ,pendingapplication Serial No; 583,574., flied March 19, 1945,now Patent No. 2,456,165, dated December 14', 194:8.V

The method of mounting the mixing valve as disclosed in .Said application in general consists of providing an insulating mounting sleeve I2 coninedn .an opening i3 formed in a block I4 disposed Within the inner and outer walls l5 of the wall il. The valve body l5 is projected through this mounting sleeve I2, and the interior portion I6" thereof isv covered by a suitable cap 'l'l secured as. at i8 to the wall il and having a bead |'9` formed at its inner end portion for the reception of a bezel ring 20. n

The wall 2l of'this cap I1I is open for the proiecti'on of the fittings 22 and 23 of the mixing valve. The inner end, portion i6 of the valve body lfisprovided' with a passage 2t which communicates with the fitting '22 and withA a measure ing chamber 25, the measuringV chamber being pxxividedA between a piston 26 andthe inner end portionv I6" of the valve body l5. In this passage 2# there is confined what is' known in the art as a fiap valve 21.

Adjacent this passage 2li, there is `formed in the innerend portion i6 of the valvev body, another passage 28 having a reduced portion 29 in which there is slidably mounted a plunger 30. In the enlarged. portion 3|V of' this Passage is a valve ball 32 normally urged by a spring 33 against a valve seat-34 to close communication through the passage. of the. plunger 3U, the plunger projecting into the measuring chamber 25. The` piston-.26 is prowith a valve chamber 35 and in this valve chamber 36 there is. mounted a flap valve 31. A

of a exible diaphragm M. The ilanged portion 45 of this diaphragm is secured in any suitable mannerin a ring 46 mounted in the valve body, as

vshown..in-Fig.. 2. This .flexible diaphragm .42 to-- gether wit-,hV the. piston. A25,V provides the .chamber dill. Communicating with this chamber'li. is. an oriflce. U, the .outer end' of which is formed in the nozzle portion 48 of, the valve body I6.

A handle element 4Q is supported by a shaft 5U, and' this shaft 58 is secured to a disc 5I This disc 'f's disposed between the plates 52 provided bythe body l5 and is pivotally supported between these plates by a pivot pin 53. The disc 5i is connected to the stud shaft 4l by means of a link 54, the pivotal connection between the link 54 and the disc 5! being' oiiset with respect to the axis of the pivot pin 53.

This valve ball 32 engages the head 35v This expands the diaphragm A4 and positions the 4 l piston 25 in a position to engage the plunger 30 to project the plunger inwardly to move the valve ball 32 from valve-closing position to admit an amount of water to enter the measuring-chamber 25. By pivoting the handle 49 in an opposite direction or in the direction to the position shown in Fig. 3, this admitted water in the chamber 25 will iind exit through the valve chamber 36 into the chamber 40, iiushing and cleansing these chambers during this passage. During this operation or movement of the piston 26 in the outer direction with respect to the 'valve body I6, the syrup is brought into the chamber 25, the diaphragm 44 having flexed to permit the piston 26 to move in the direction of movement as shown in Fig. 3. When the piston is moved in this direction, the flap valve 31 will be closed so as to prevent the admission of syrup into the chamber 40. The piston is moved in an opposite direction, at which time the flap valve 21 opens, permitting the syrup to pass into the chamber 60 and thence into the orifice 41 into a suitable container. Continued movement of the piston rearwardly brings the piston into engagement with the plunger 30, opening the valve closed by the valve ball 32, permitting the inflow of water which passes through the valve chamber 3B and chamber 4G through the orice fil' into the glass or container. As this water passes through the valve body I6 in the manner just disclosed, it is manifest that all the syrup is washed from within the chambers 25 and d6, leaving these chambers free of any syrup until the next operation of the valve.

In this construction of a mixingrvalve, it is apparent that the water serves as a seal between the moving parts, and therefore it is not Anecessary to employ any piston rings or seals with the Y piston 2E. Movement of this piston 2S is-free by virtue of the iiexible diaphragm 44 and, by

employing such a diaphragm, it is clear that in the chamber A5 there will remain a quantity of Water which serves to lubricate the parts, that is, prevent the moving parts from clinging together by syrup which would otherwise coagulate Within the chambers.

From the foregoing description, it is manifest that I have provided a mixing valve which accomplishes the foregoing objects and one which will be highly eiiicient in use Yand economical in manufacture.

While I have illustrated and described the preferred form of construction for carrying my invention into eiect, this is capable ofl variation and modiiication without departing from the spirit of the invention. I therefore do not wish to be li-mited to the precise details of construction set forth, but desire to avail myself of such vari ations and modifications as come .within the scope of the appended claims.

Having thus described my invention, what I 4 claim as new and desire to protect by Letters Patent is:

1. A mixing valve comprising a valve body havlng a plurality of passages formed therein, valve members controlling communication through 'said passages, a piston including a iiexible diaphragm movable in said valve body and providing rearward and forward chambers, the rearward chamber communicating with the valve passages, a valve structure carried by and movable with the piston and adapted to open communication between the chambers, and means for moving said piston within said valve body.

2. A mixing valve including a valve body, a piston movable in the body and providing, together with an end portion of said body, a chamber, supply passages communicating With said chamber, valve passages in said chamber controlling communication therethrough, a exible diaphragm carried by said body and providing together with said piston a chamber on the side of the piston opposite said iirst-named chamber, and means controlling communication between said chambers.

3. A mixing valve including a valve body, a piston movable in the body and providing, together with an end portion of said body, a chamber, supply passages communicating with said chamber, valve passages in said chamber controlling communication therethrough, a flexible diaphragm carried 'by said body and providing together with said piston a chamber on the side of the piston opposite said first-named chamber, and a valve structure carried by said piston and controlling communication between said chambers.

4. A mixing valve including a valve body, a piston movable in the body and providing, together with an end portion of said body, a chamber, supply passages communicating with said chamber, valve passages in said chamber controlling communication therethrough, a flexible diaphragm carried by said body and providing together With said piston a chamber on the side of the piston opposite said iirst-named chamber, and means controlling communication between said chambers, said means including a iiap valve.

'5. A mixing valve including a valve body, a piston movable in the body and providing, together .with an end portion of said body, a chamber, supply passages communicating withv said chamber, valve passages in said chamber controlling communication therethrough, a flexible diaphragm carried by said body and providing together with said piston a chamber on the side of the piston opposite said first-named chamber, and a valve structure carried by said piston and controlling communication between said chambers, said means including a ap valve.

' RUDOLPH REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS YUZA. 

